Inspection frequence

The mean time to failure of various instrumentation and equipment parts would be known from the manufacturer s data or the employer s experience with the parts, which then influence inspection and testing frequency and associated procedures. Also, applicable codes and standards—such as the National Board Inspection Code, or those from the American Society for Testing and Materials, American Petroleum Institute, National Fire Protection Association, American National Standards Institute, American Society of Mechanical Engineers, and other groups—provide information to help establish an effective testing and inspection frequency, as well as appropriate methodologies. 

Equipment used to process, store, or handle highly hazardous chemicals must be designed constructed, installed and maintained to minimize the risk of release. A systematic, scheduled, test and maintenance program is preferred over "breakdown" maintenance " that could compromise safety. Elements of a mechanical integrity program include 1) identification and categorization of equipment and instrumentation, 2) documentation of manufacturer data on mean time to failure, 3 ) test and inspection frequencies, 4) maintenance procedures, 5) training of maintenance personnel, 6) test criteria, and 7) documentation of test and inspection results. 

The TGA uses a more refined system for setting inspection frequency, based on product type and on manufacturer type. The risk-management approach applied to licensing is... 

Identifying and implementing possible improvements in mechanical integrity programs, such as increasing inspection frequencies for piping in corrosive or erosive service... 

Pumps Relief, Reverse Rotation, Calibration, Inspection Frequency, Adequacy... 

Normally, testing is carried out in order to determine the suitability of a material of construction for handling a process fluid. However, testing can be used for different purposes. Typically this might be to justify a modified inspection frequency of equipment on an existing plant. 

The best way of effectively determining a maintenance schedule is by keeping a detailed log on the history of each valve. Inspection frequency should be based on criteria which is explained hereafter. We will demonstrate how to build a schedule of inspection activities based on historical data for each individually installed valve This procedure starts with installation An SRV is tagged and is given a passport containing all of its data, process data and revision dates with comments and the spare parts used and when. Actually, the basis of this passport already exists when it leaves the manufacturer (on the tag plate) and the basic records of the valve are also kept with the manufacturer for later reference. 

The accumulation area should be inspected regularly. The inspection frequency can depend on the level of activity and the degree of hazard, but generally should be at least weekly. The inspection should include the following considerations ... 

Delays to Safety Critical Instrument Test and Equipment Inspection Frequencies... 

Some companies are now using Risk-Based Inspections (RBI), especially for the costly preparation efforts for internal inspections. RBI is a method that is gaining credibility and popularity. Organizations calculate a proposed inspection frequency by considering the consequences of failure (as described previously) and the likelihood of failure based on the anticipated internal corrosion rates. The method employs a risk matrix. 

Other Process Safety Factors, e.g.. Equipment Selection, Engineering Design, Specification of Inspection Frequency and Technique, Unsafe Behaviors and Insufficient Operating Discipline. 

Table 1 Determination of inspection frequency of short-term tests by study type, average study frequency ( rolling statistics over two years)...

One of the instruments of Quality Assurance for ascertaining and ensuring the continued adherence to the rules of GLP in a test facility as such, and within the studies performed, is the inspection of facilities and experimental activities. The GLP Principles do not require a constant supervision, since it is recognised that randomly conducted inspections will be sufficient to ensure compliance with the GLP rules. These inspections have, however, to meet an important point They have to cover those parts of a study which are of special importance for the validity of the data and the conclusions to be drawn therefrom, or where deviations from the rules of GLP would most heavily impact on the integrity of the study. This holds for studies which undergo multiple inspections during their conduct as well as for those which may be inspected only on a process basis. Quality Assurance thus has to strike a fine balance in their inspectional activities, taking into consideration such aspects as inspection frequency, study type and critical phases , in order to achieve a well supported view of the GLP compliance at the test facility and within the studies conducted. 

Maintenance procedures Written instmctions that address material control and maintenance practices needed to ensure system operability and integrity as well as maintenance, testing, and inspection frequency. 

Because all chemicals are not the same, inspection periods need to be adjusted for each chemical. Storage conditions should also be included in determining the inspection frequency. An important part of managing time-sensitive chemicals is to determine appropriate inspection periods for each chemical in the program. Inspection periods for each chemical should be... 

Enhanced preventive and predictive mainterumce PMlPdM) Automatic scheduling of repetitive PM activities is possible through CMMS. PM tasks and inspection frequencies can be documented on the PM module and printed as part of the PM work order. A CMMS enhances PM by providing a method to monitor failure trends and highlight major causes of equipment breakdowns and unscheduled repairs. 

Information (where appropriate) on programming, sequence of operation and inspection, frequency and method of functional testing, guidance on adjustments and maintenance (especially on the protective devices and circuits), parts list, in particular the spare parts ... 

Newbold, K.B., McKeary, M., Hart, R., Hall, R. (2008) Restaurant inspection frequency and food safety compliance J. of Environmental Health, 71(4), pp. 56-61. 

These categories set the period of time used as the objective for timely detection of a diversion (timeliness component of the inspection goal) and govern the inspection frequencies (number of inspections per year). Material categories and typical inspection frequencies are shown in O Table 63.2. 

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